I had the most fun at my local library's mermaid tea party. When I walked into the room and saw 90 places set, I thought 'no way', but it filled up! The librarians were amazing: dressing up, having a shell craft to paint, a photo booth and boat, and themed snacks (Including cupcakes as mermaid tails and guppy juice)!
It reaffirmed my belief that librarians are awesome!!!